Migration Watch UK says the rise in the numbers of Romanians and Bulgarians making their way to Great Britain will rise to 50,000 a year once restrictions on the types of work they can do are lifted.
This increase of just over a third in Romanian and Bulgarian workers in the UK over the past year is a sharp increase on the previous trend.
It suggests that still larger numbers will arrive next year when our labour market is fully open to them.
This is consistent with our central estimate that net migration from Romania and Bulgaria will run at about 50,000 a year for the next five years.
The government has refused to give a figure for how many workers from Romania and Bulgaria it expects to arrive in the UK.
More top news
Simon Cowell says he "felt like a bit of an idiot" after learning the Britain's Got Talent winner used a stunt double dog during the final.
An advert for luxury fashion brand Yves Saint Laurent has been banned for featuring a model with a visible rib cage and stick-thin legs.
Every school rated as inadequate by Ofsted will be turned into academies under new laws, the Education Secretary has announced.